</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
2920.90.51.00/Silicic Acid Tetraethyl Ester (Tetraethoxysilane)/Mexico

Silicic Acid Tetraethyl Ester (Tetraethoxysilane) from Mexico

Tetraethyl orthosilicate (TEOS) is silicic acid tetraester used in sol-gel processing, chemical vapor deposition, and zeolite manufacturing. Classifies under HTS 2920.90.51.00 as ester of inorganic silicon acid. Semiconductor precursor.

Duty Rate — Mexico → United States

13.7%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Calculate with your customs valueVerify classification with AI

Import Tips

• Hydrolysis rate data needed for sol-gel application declarations

• Silicon content verification prevents misclassification as organosilicon polymer

Silicic Acid Tetraethyl Ester (Tetraethoxysilane) from Mexico — Import Duty Rate | HTS 2920.90.51.00